Compressor



W. A. MEYER Aug. 1 l, 1936.

COMPRESSOR Filed 0c t. 10, 1951 VENTOR.

Patented Aug... 11,1936

unit's!) STATES aster PATENT OFFifiE 1 Claim.

This invention relates primarily to compressors of the reciprocating.type although certain features thereof may be advantageously employed inmotors of the same type.

it One object of the present invention is the provision in a machine ofthe reciprocating piston type of means for efiecting reciprocation of acylinder simultaneously with the coacting piston and in oppositedirection so as to permit a reduciti tion in the piston stroke'for agiven chamber expansion and'so as to reduce vibration by balancing theinertia forces of the cylinder against, those of the piston.

Another object is to utilize the movement of 35 the cylinder to controlthe admission and discharge of fluid to andfrom the cylinder space orchamber through ports provided for the purpose in such manner as toeliminate the necessity for Valves such as are ordinarily required inmachines of this type.

Other more specific objects and advantages will appear from thefollowing description of an illustrative embodiment of the presentinvention.

In the accompanying drawing: v

as Figure 1 is a top plan view of a compressor constructed in accordancewith the teachings of the present invention.

Fig. 2 is a vertical sectional view thereof.

. Fig. 3 is a vertical sectional view taken along 30 the line 3-3 ofFig. 2.

The compressor shown comprises a housing or casing having a base i,forming an oil reservoir. an upright portion 2, and a removable cover 3.A power shaft is journalled in the housing '5 within a pair of spacedradial end thrust bearings 4, fixed in circular bearing supportsformedin the housing, and secured in position-by appropriate removable endheads I4 and l5.

1 Between the bearings l the shaft 5 is provided 40 withtwo circulareccentrics 6 and 'I fixed to rotate therewith and each set at an angleof one hundred eighty degrees with respect to the other. Eccentric 6 isrotatable within a circular fitting carried by the lower end of aconnecting rod 8;

45 and eccentric I is rotatable within a circular fitting carried by thelower end of a. connecting rod 9. The rod 8 is rockably supported at itsupper end upon a pin l0, fixed in appropriate cars which project fromthe side of a cylinder H; and rod 50 a 'is rockably mounted at its upperend upon a similar pin' i2 fixed in the lower endof a piston l3. -j Thearrangement is such that when the shaft is rotated the cylinder H isreciprocated longiss tudinaiiy within the housing portion 2 and thepiston is is simultaneously reciprocated longitudinally within thecylinder H but. in opposite directions. The cylinder space orcompression chamber formed by and between thepiston i3 and the upperend'head of the cylinder ii is 5 thus contracted during the down strokeof the cylinder and the simultaneous up stroke of the v piston and isexpanded during the up stroke of the cylinder and the simultaneous downstroke of the-piston. i0 Fluid to be compressed is admitted to thecompression space of the cylinder it through a horizontally extendedslotted port it and the compressed fluid is discharged through a similarport is, preferably formed in the diametrically opposite side of thecylinder. Port ill registers with a supply passage it when the cylinderis at the upper limit of its stroke; and port 58 registers with a.discharge passage I!) when the cylinder reaches the lower limit of itsstroke. During the down stroke of the cylinder the supply passage [6 isclosed by an end flange or apron formed on the upper end of thecylinder. A vent passage 2'! formed in the cover 3 prevents theformation of pressure within that chamber above the cylinder H duringreciprocation thereof.

The operation of the compressor shown is as iollows:During the up strokeof the cylinder H and simultaneous down stroke of the piston l3,

ports I! and it are closed so that a partial vacuum is established inthe chamber above the piston, until port I I communicates with thesupply passage l6, whereupon that chamber is immediately filled withvfluid to be compressed. Thereafter, during the down stroke of thecylinder II and the simultaneous up stroke of the piston 13, the portsI! and I8 are again closed and the contents of the chamber is compresseduntil port l8 communicates with the discharge passage, whereupon thecontents of the chamber is discharged.

Various changes may\ be made in the embodiment of the inventionhereinabove specifically described without departing from or sacrificingthe advantages of the invention as defined in 5 the appended claims.

In a machine of the character described, the combination of a housing, acylinder longitudinally reciprocable therein and having an end headmovable therewith, a piston longitudinally reciprocable in said cylinderand cooperating with said and head to form a.compression space, a powershaft journalled" in said housing, two eccentric driv ing means on saidshaft, a connecting

